/** @file * @brief Реализация режимов работы блочных алгоритмов * * @copyright InfoTeCS. All rights reserved. */ #include #include #include #include #include "28147_14.h" #include "block_chipher.h" /** @brief определение внутреннего ассерта */ #define INFOTECS_ASSERT(e) typedef char __C_ASSERT__[(e)?1:-1] /** @brief размер тестовых данных для алгоритма "кузнечик" */ #define textLen14 sizeof(kSeltTestGost14PlainText)/sizeof(kSeltTestGost14PlainText[0]) /** @brief размер тестовых данных для алгоритма 28147-89 */ #define textLen89 sizeof(kSeltTestGost89PlainText)/sizeof(kSeltTestGost89PlainText[0]) /** @brief Признак алгоритма "Кузнечик" */ const unsigned char kAlg14 = 1; /** @brief Признак алгоритма 28147-89 */ const unsigned char kAlg89 = 2; /** @brief указатель на функцию шифрования */ typedef int (DLL_IMPORT *pEncrypt)(unsigned char* plainText, unsigned char* chipherText, unsigned char* keys); /** @brief указатель на функцию расшифрования */ typedef int (DLL_IMPORT *pDecrypt)(unsigned char* chipherText, unsigned char* plainText, unsigned char* keys); /** @brief Функция самотестирования режима ECB */ static int SelfTestGost14Ecb(); /** @brief Функция самотестирования режима ECB */ static int SelfTestGost89Ecb(); /** @brief Функция самотестирования режима CRT */ static int SelfTestGost14Crt(); /** @brief Функция самотестирования режима CRT */ static int SelfTestGost89Crt(); /** @brief Функция самотестирования режима OFB */ static int SelfTestGost14Ofb(); /** @brief Функция самотестирования режима OFB */ static int SelfTestGost89Ofb(); /** @brief Функция самотестирования режима CBC */ static int SelfTestGost14Cbc(); /** @brief Функция самотестирования режима CBC */ static int SelfTestGost89Cbc(); /** @brief Функция самотестирования режима CFB */ static int SelfTestGost14Cfb(); /** @brief Функция самотестирования режима CFB */ static int SelfTestGost89Cfb(); /** @brief Функция самотестирования режима имитовставки */ static int SelfTestGost14Imit(); /** @brief Функция самотестирования режима имитовставки */ static int SelfTestGost89Imit(); /** @brief Сдвиг влево на 1 бит */ static void ShifttLeftOne(unsigned char *r, size_t length); /** @brief Контекст ECB */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* Keys; /**< ключ */ unsigned int BlockLen; /**< размер блока */ pEncrypt EncryptFunc; /**< функция шифрования */ pDecrypt DecryptFunc; /**< функция расшифрования */ } Context_ecb; /** @brief Контекст CRT */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* Counter; /**< счетчик */ unsigned char* Keys; /**< ключ */ size_t S; /**< размер синхропосылки */ size_t BlockLen; /**< размер блока */ pEncrypt EncryptFunc; /**< функция шифрования */ unsigned char *tmpblock; /**< временный блок */ } Context_crt; /** @brief Контекст OFB */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* IV; /**< синхропосылка */ unsigned char* Keys; /**< ключ */ size_t M; /**< размер синхрпосылки */ size_t S; /**< параметр S */ size_t BlockLen; /**< размер блока */ pEncrypt EncryptFunc; /**< функция шифрования */ pDecrypt DecryptFunc; /**< функция расшифрования */ unsigned char *tmpblock; /**< временный блок */ unsigned char* nextIV; /**< синхропосылка для следующего блока */ } Context_ofb; /** @brief Контекст CFB */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* IV; /**< синхропосылка */ unsigned char* Keys; /**< ключ */ size_t M; /**< размер синхрпосылки */ size_t S; /**< параметр S */ size_t BlockLen; /**< размер блока */ pEncrypt EncryptFunc; /**< функция шифрования */ pDecrypt DecryptFunc; /**< функция расшифрования */ unsigned char *tmpblock; /**< временный блок */ unsigned char* nextIV; /**< синхропосылка для следующего блока */ } Context_cfb; /** @brief Контекст CBC */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* IV; /**< синхропосылка */ unsigned char* Keys; /**< ключ */ size_t BlockLen; /**< размер блока */ size_t M; /**< размер синхрпосылки */ pEncrypt EncryptFunc; /**< функция шифрования */ pDecrypt DecryptFunc; /**< функция расшифрования */ unsigned char* nextIV; /**< синхропосылка для следующего блока */ unsigned char* tempIV; /**< для временного хранения значения синхропосылки */ unsigned char *tmpblock; /**< временный блок */ } Context_cbc; /** @brief Контекст имитовставки */ typedef struct { unsigned char Alg; /**< идентификатор алгоритма */ unsigned char* Keys; /**< ключ */ unsigned char* K1; /**< вспомогательный параметр K1 */ unsigned char* K2; /**< вспомогательный параметр K2 */ unsigned char* B; /**< вспомогательный параметр B */ unsigned char* R; /**< вспомогательный параметр R */ unsigned char* C; /**< вспомогательный параметр C */ unsigned char* LastBlock; /**< предыдущий блок */ size_t S; /**< параметр S */ size_t BlockLen; /**< размер блока */ size_t LastBlockSize; /**< размер предыдущего блока */ int isFistBlock; /**< идентификатор первого блока */ pEncrypt EncryptFunc; /**< функция шифрования */ unsigned char *tmpblock; /**< временный блок */ unsigned char *resimit; /**< имитовставка */ } Context_imit; static int init_ecb_14_impl(unsigned char *key, void* ctx) { Context_ecb* context = 0; INFOTECS_ASSERT(sizeof(Context_ecb)<=kEcb14ContextLen); if(!ctx || !key) return -1; context = (Context_ecb*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->DecryptFunc = Decrypt_14; context->BlockLen = kBlockLen14; context->Keys = (unsigned char*)malloc(10 * kBlockLen14); if( !context->Keys ) return -1; memset(context->Keys, 0, 10 * kBlockLen14); ExpandKey(key, context->Keys); return 0; } int DLL_IMPORT init_ecb_14(unsigned char *key, void* ctx) { if(SelfTestGost14Ecb()) return -1; return init_ecb_14_impl(key, ctx); } void DLL_IMPORT free_ecb(void* ctx) { Context_ecb* context; if(!ctx) return; context = (Context_ecb*)(ctx); if(context->Keys) { free(context->Keys); context->Keys = 0; } } static int init_cbc_14_impl(unsigned char *key, void* ctx, unsigned char *iv, size_t ivLength) { Context_cbc* context; INFOTECS_ASSERT(sizeof(Context_cbc)<=kCbc14ContextLen); if(!ctx || !key || !iv || (ivLength % kBlockLen14)) return -1; context = (Context_cbc*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->DecryptFunc = Decrypt_14; context->BlockLen = kBlockLen14; context->M = ivLength; context->IV = (unsigned char*)malloc(ivLength); context->Keys = (unsigned char*)malloc(10 * kBlockLen14); context->tempIV = (unsigned char*)malloc(context->M); context->nextIV = (unsigned char*)malloc(context->M); context->tmpblock = (unsigned char *)malloc(kBlockLen14); if( !context->IV || !context->Keys || !context->tempIV || !context->nextIV || !context->tmpblock ) return -1; memcpy(context->IV, iv, ivLength); memset(context->Keys, 0, 10 * kBlockLen14); ExpandKey(key, context->Keys); return 0; } int DLL_IMPORT init_cbc_14(unsigned char *key, void* ctx, unsigned char *iv, size_t ivLength) { if(SelfTestGost14Cbc()) return -1; return init_cbc_14_impl(key, ctx, iv, ivLength); } void DLL_IMPORT free_cbc(void* ctx) { Context_cbc* context; if(!ctx) return; context = (Context_cbc*)ctx; if(context->Keys) { free(context->Keys); context->Keys = 0; } if(context->IV) { free(context->IV); context->IV = 0; } if(context->tempIV) { free(context->tempIV); context->tempIV = 0; } if(context->nextIV) { free(context->nextIV); context->nextIV = 0; } if(context->tmpblock) { free(context->tmpblock); context->tmpblock = 0; } } static int init_crt_14_impl(unsigned char* key, unsigned char *iv, size_t s, void *ctx) { Context_crt* context; INFOTECS_ASSERT(sizeof(Context_crt)<=kCrt14ContextLen); if(!ctx || !key || s > kBlockLen14) return -1; context = (Context_crt*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->BlockLen = kBlockLen14; context->S = s; context->tmpblock = (unsigned char*)malloc(kBlockLen14); context->Keys = (unsigned char*)malloc(10*kBlockLen14); context->Counter = (unsigned char*)malloc(kBlockLen14); if( !context->tmpblock || !context->Keys || !context->Counter ) return -1; memset(context->Keys, 0, 10 * kBlockLen14); ExpandKey(key, context->Keys); memset(context->Counter, 0, kBlockLen14); memcpy(context->Counter, iv, kBlockLen14/2); return 0; } int DLL_IMPORT init_crt_14(unsigned char* key, unsigned char *iv, size_t s, void *ctx) { if(SelfTestGost14Crt()) return -1; return init_crt_14_impl(key, iv, s, ctx); } void DLL_IMPORT free_crt(void* ctx) { Context_crt* context; if(!ctx) return; context = (Context_crt*)ctx; if(context->Keys) { free(context->Keys); context->Keys = 0; } if(context->Counter) { free(context->Counter); context->Counter = 0; } if(context->tmpblock) { free(context->tmpblock); context->tmpblock = 0; } } static int init_ofb_14_impl(unsigned char *key, void *ctx, size_t s, unsigned char *iv, size_t ivLength) { Context_ofb* context; INFOTECS_ASSERT(sizeof(Context_ofb)<=kOfb14ContextLen); if(!ctx || !key || s > kBlockLen14 || (ivLength % kBlockLen14) || !ivLength || !s) return -1; context = (Context_ofb*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->DecryptFunc = Decrypt_14; context->BlockLen = kBlockLen14; context->IV = (unsigned char*)malloc(ivLength); context->tmpblock = (unsigned char*)malloc(kBlockLen14); context->nextIV = (unsigned char*)malloc(ivLength); context->Keys = (unsigned char*)malloc(10*kBlockLen14); if( !context->IV || !context->tmpblock || !context->nextIV || !context->Keys ) return -1; memcpy(context->IV, iv, ivLength); context->M = ivLength; context->S = s; memset(context->Keys, 0, 10*kBlockLen14); ExpandKey(key, context->Keys); return 0; } int DLL_IMPORT init_ofb_14(unsigned char *key, void *ctx, size_t s, unsigned char *iv, size_t ivLength) { if(SelfTestGost14Ofb()) return -1; return init_ofb_14_impl(key, ctx, s, iv, ivLength); } void DLL_IMPORT free_ofb(void* ctx) { Context_ofb* context; if(!ctx) return; context = (Context_ofb*)ctx; if(context->Keys) { free(context->Keys); context->Keys = 0; } if(context->IV) { free(context->IV); context->IV = 0; } if(context->tmpblock) { free(context->tmpblock); context->tmpblock = 0; } if(context->nextIV) { free(context->nextIV); context->nextIV = 0; } } static int init_cfb_14_impl(unsigned char *key, void *ctx, size_t s, unsigned char *iv, size_t ivLength) { Context_cfb* context; INFOTECS_ASSERT(sizeof(Context_cfb)<=kCfb14ContextLen); if(!ctx || !key || s > kBlockLen14 || (ivLength % kBlockLen14) || !ivLength || !s) return -1; context = (Context_cfb*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->DecryptFunc = Decrypt_14; context->BlockLen = kBlockLen14; context->IV = (unsigned char*)malloc(ivLength); context->tmpblock = (unsigned char*)malloc(kBlockLen14); context->nextIV = (unsigned char*)malloc(ivLength); context->Keys = (unsigned char*)malloc(10 * kBlockLen14); if( !context->IV || !context->tmpblock || !context->nextIV || !context->Keys ) return -1; memcpy(context->IV, iv, ivLength); context->M = ivLength; context->S = s; memset(context->Keys, 0, 10 * kBlockLen14); ExpandKey(key, context->Keys); return 0; } int DLL_IMPORT init_cfb_14(unsigned char *key, void *ctx, size_t s, unsigned char *iv, size_t ivLength) { if(SelfTestGost14Cfb()) return -1; return init_cfb_14_impl(key, ctx, s, iv, ivLength); } void DLL_IMPORT free_cfb(void* ctx) { Context_cfb* context; if(!ctx) return; context = (Context_cfb*)ctx; if(context->Keys) { free(context->Keys); context->Keys = 0; } if(context->IV) { free(context->IV); context->IV = 0; } if(context->tmpblock) { free(context->tmpblock); context->tmpblock = 0; } if(context->nextIV) { free(context->nextIV); context->nextIV = 0; } } static int ExpandImitKey(unsigned char *key, void *ctx) { Context_imit* context; int r; size_t i; if(!ctx || !key) return -1; context = (Context_imit*)ctx; memset(context->tmpblock, 0, context->BlockLen); context->EncryptFunc(context->tmpblock, context->R, context->Keys); r = ((context->R[0] & 0x80) == 0x80); ShifttLeftOne(context->R, context->BlockLen); if(r == 1) { for(i = 0; i < context->BlockLen; ++i) { context->K1[i] = context->R[i] ^ context->B[i]; } } else { memcpy(context->K1, context->R, context->BlockLen); } memcpy(context->tmpblock, context->K1, context->BlockLen); ShifttLeftOne(context->tmpblock, context->BlockLen); if((context->K1[0] & 0x80) == 0x80) { for(i = 0; i < context->BlockLen; ++i) { context->K2[i] = context->tmpblock[i] ^ context->B[i]; } } else { memcpy(context->K2, context->tmpblock, context->BlockLen); } return 0; } static int init_imit_14_impl(unsigned char *key, size_t s, void *ctx) { Context_imit* context; INFOTECS_ASSERT(sizeof(Context_imit)<=kImit14ContextLen); if(!ctx || !key || s > kBlockLen14 || !s) return -1; context = (Context_imit*)ctx; context->Alg = kAlg14; context->EncryptFunc = Encrypt_14; context->BlockLen = kBlockLen14; context->S = s; context->Keys = (unsigned char*)malloc(10 * kBlockLen14); context->R = (unsigned char*)malloc(kBlockLen14); context->B = (unsigned char*)malloc(kBlockLen14); context->K1 = (unsigned char*)malloc(kBlockLen14); context->K2 = (unsigned char*)malloc(kBlockLen14); context->C = (unsigned char*)malloc(kBlockLen14); context->LastBlock = (unsigned char*)malloc(kBlockLen14); context->tmpblock = (unsigned char*)malloc(kBlockLen14); context->resimit = (unsigned char*)malloc(kBlockLen14); if( !context->Keys || !context->R || !context->B || !context->K1 || !context->K2 || !context->C || !context->LastBlock || !context->tmpblock || !context->resimit ) return -1; memset(context->Keys, 0, 10 * kBlockLen14); ExpandKey(key, context->Keys); memset(context->R, 0, kBlockLen14); memset(context->B, 0, kBlockLen14); context->B[kBlockLen14-1] = 0x87; memset(context->K1, 0, kBlockLen14); memset(context->K2, 0, kBlockLen14); memset(context->C, 0, kBlockLen14); memset(context->LastBlock, 0, kBlockLen14); context->LastBlockSize = 0; context->isFistBlock = 1; ExpandImitKey(key, ctx); return 0; } int DLL_IMPORT init_imit_14(unsigned char *key, size_t s, void *ctx) { if(SelfTestGost14Imit()) return -1; return init_imit_14_impl(key, s, ctx); } void DLL_IMPORT free_imit(void* ctx) { Context_imit* context; if(!ctx) return; context = (Context_imit*)ctx; if(context->Keys) { free(context->Keys); context->Keys = 0; } if(context->R) { free(context->R); context->R = 0; } if(context->B) { free(context->B); context->B = 0; } if(context->K1) { free(context->K1); context->K1 = 0; } if(context->K2) { free(context->K2); context->K2 = 0; } if(context->C) { free(context->C); context->C = 0; } if(context->LastBlock) { free(context->LastBlock); context->LastBlock = 0; } if(context->tmpblock) { free(context->tmpblock); context->tmpblock = 0; } if(context->resimit) { free(context->resimit); context->resimit = 0; } } int DLL_IMPORT encrypt_ecb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_ecb* context; unsigned char* block; size_t i; if(!ctx || !indata || !outdata) return -1; context = (Context_ecb*)ctx; if(!length || (length % context->BlockLen)) return -1; block = outdata; for(i = 0; i < (length / context->BlockLen) ; ++i) { context->EncryptFunc(indata, block, context->Keys); indata += context->BlockLen; block += context->BlockLen; } return 0; } int DLL_IMPORT decrypt_ecb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_ecb* context; size_t i; if(!ctx || !indata || !outdata) return -1; context = (Context_ecb*)ctx; if(!length || (length % context->BlockLen)) return -1; for(i = 0; i < (length / context->BlockLen) ; ++i) { context->DecryptFunc(indata, outdata, context->Keys); indata += context->BlockLen; outdata += context->BlockLen; } return 0; } static void PackBlock(unsigned char* a, size_t aLen, unsigned char* b, unsigned char* r, size_t rLen) { memcpy(r, a, aLen); memcpy(r + aLen, b, rLen - aLen); } int DLL_IMPORT encrypt_cbc(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_cbc* context; size_t i, j; if(!ctx || !indata || !outdata) return -1; context = (Context_cbc*)ctx; if(!length || (length % context->BlockLen)) return -1; memcpy(context->tempIV, context->IV, context->M); for(i = 0; i < (length / context->BlockLen); ++i) { for(j = 0; j < context->BlockLen; ++j) { context->tmpblock[j] = context->tempIV[j] ^ indata[j]; } context->EncryptFunc(context->tmpblock, outdata, context->Keys); indata += context->BlockLen; PackBlock(context->tempIV+context->BlockLen, context->M - context->BlockLen, outdata, context->nextIV,context->M); outdata += context->BlockLen; memcpy(context->tempIV, context->nextIV,context->M); } return 0; } int DLL_IMPORT decrypt_cbc(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_cbc* context; size_t i, j; if(!ctx || !indata || !outdata) return -1; context = (Context_cbc*)ctx; if(!length || ((length % context->BlockLen))) return -1; memcpy(context->tempIV, context->IV, context->M); for(i = 0; i < (length / context->BlockLen); ++i) { context->DecryptFunc(indata, outdata, context->Keys); for(j = 0; j < context->BlockLen; ++j) { outdata[j] ^= context->tempIV[j]; } outdata += context->BlockLen; PackBlock(context->tempIV + context->BlockLen, context->M - context->BlockLen, indata, context->nextIV, context->M) ; memcpy(context->tempIV, context->nextIV, context->M); indata += context->BlockLen; } return 0; } static void IncrementModulo(unsigned char* value, size_t size) { size_t lastIndex = size - 1; size_t i; for(i = 0; i < size; ++i) { if( value[lastIndex - i] > 0xfe ) { value[lastIndex - i] -= 0xfe; } else { ++value[lastIndex - i]; break; } } } int DLL_IMPORT crypt_crt(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_crt* context; size_t i; size_t j; if(!indata || !outdata || !ctx || !length) return -1; context = (Context_crt*)ctx; for(i = 0; i < (length / context->S); ++i) { context->EncryptFunc(context->Counter, context->tmpblock, context->Keys); for(j =0; j < context->S; ++j) { outdata[j] = indata[j] ^ context->tmpblock[j]; } outdata+= context->S; indata+= context->S; IncrementModulo(context->Counter, context->BlockLen); } for(i = 0; i < (length % context->S); ++i) { context->EncryptFunc(context->Counter, &context->tmpblock[0], context->Keys); for(j =0; j < (length % context->S); ++j) { outdata[j] ^= context->tmpblock[j]; } IncrementModulo(context->Counter, context->BlockLen); } return 0; } int DLL_IMPORT crypt_ofb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_ofb* context; size_t i, j; if(!indata || !outdata || !ctx || !length) return -1; context = (Context_ofb*)ctx; for(i = 0; i < (length/context->BlockLen); ++i) { context->EncryptFunc(context->IV, context->tmpblock, context->Keys); PackBlock(context->IV + context->BlockLen, context->M - context->BlockLen, context->tmpblock, context->nextIV, context->M); memcpy(context->IV, context->nextIV, context->M); for(j = 0; j < context->S; ++j) { *outdata++ = *indata++ ^ context->tmpblock[j]; } } return 0; } int DLL_IMPORT encrypt_ofb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { return crypt_ofb(ctx, indata, outdata, length); } int DLL_IMPORT decrypt_ofb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { return crypt_ofb(ctx, indata, outdata, length); } int DLL_IMPORT encrypt_cfb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_cfb* context; size_t i, j; if(!indata || !outdata || !ctx || !length) return -1; context = (Context_cfb*)ctx; for(i = 0; i < (length/context->BlockLen); ++i) { context->EncryptFunc(context->IV, context->tmpblock, context->Keys); for(j = 0; j < context->S; ++j) { outdata[j] = indata[j] ^ context->tmpblock[j]; } indata += context->S; PackBlock(context->IV + context->S, context->M - context->S, outdata, context->nextIV, context->M); memcpy(context->IV, context->nextIV, context->M); outdata += context->S; } for(i = 0; i < (length % context->BlockLen); ++i) { context->EncryptFunc(context->IV, context->tmpblock, context->Keys); for(j = 0; j < context->S; ++j) { outdata[j] = indata[j] ^ context->tmpblock[j]; } } return 0; } int DLL_IMPORT decrypt_cfb(void *ctx, unsigned char *indata, unsigned char *outdata, size_t length) { Context_cfb* context; size_t i, j; if(!indata || !outdata || !ctx || !length) return -1; context = (Context_cfb*)ctx; for(i = 0; i < (length / context->S); ++i) { context->EncryptFunc(context->IV, context->tmpblock, context->Keys); for(j = 0; j < context->S; ++j) { outdata[j] = indata[j] ^ context->tmpblock[j]; } outdata += context->S; PackBlock(context->IV + context->S, context->M - context->S, indata, context->nextIV, context->M); indata += context->S; memcpy(context->IV, context->nextIV, context->M); } for(i = 0; i < (length % context->S); ++i) { context->EncryptFunc(context->IV, context->tmpblock, context->Keys); for(j = 0; j < context->S; ++j) { outdata[j] = indata[j] ^ context->tmpblock[j]; } } return 0; } static void ShifttLeftOne(unsigned char *r, size_t length) { size_t i; for(i =0; i < length -1 ; ++i) { r[i] <<= 1; r[i] &= 0xfe; r[i] |= ((r[i+1]>>7)&0x1); } r[length -1] <<= 1; r[length -1] &= 0xfe; } int DLL_IMPORT imit(void *ctx, unsigned char *indata, size_t length) { Context_imit* context; size_t i, j; if(!ctx || !indata || !length ) return -1; context = (Context_imit*)ctx; for(i = 0; i < length / context->BlockLen; ++i) { if(context->isFistBlock) { memcpy(context->LastBlock, indata, context->BlockLen); context->LastBlockSize = context->BlockLen; context->isFistBlock = 0; indata += context->BlockLen; continue; } for(j = 0; j < context->BlockLen; ++j) { context->LastBlock[j] ^= context->C[j]; } context->EncryptFunc(context->LastBlock, context->C, context->Keys); memcpy(context->LastBlock, indata, context->BlockLen); indata += context->BlockLen; } for(i = 0; i < length % context->BlockLen; ++i) { memcpy(context->LastBlock, indata, length % context->BlockLen); context->LastBlockSize = length % context->BlockLen; } return 0; } int DLL_IMPORT done_imit(void *ctx, unsigned char *value) { Context_imit* context; unsigned char* K; size_t i; if(!ctx || !value) return -1; context = (Context_imit*)(ctx); memcpy(context->tmpblock, context->LastBlock, context->LastBlockSize); if(context->LastBlockSize!=context->BlockLen) { padd(context->tmpblock, context->LastBlockSize, context->BlockLen); } for(i = 0; i < context->BlockLen; ++i) { context->tmpblock[i] ^= context->C[i]; } K = context->LastBlockSize!=context->BlockLen ? context->K2 : context->K1; for(i = 0; i < context->BlockLen; ++i) { context->tmpblock[i] ^= K[i]; } context->EncryptFunc(context->tmpblock, context->resimit, context->Keys); memcpy(value, context->resimit, context->S); return 0; } int DLL_IMPORT padd(unsigned char *data, size_t length, size_t blockLen) { size_t paddingLen; size_t i; if(!data || !length) return -1; paddingLen = blockLen - (length % blockLen); *(data+length) = 1; for(i = 1; i < paddingLen; ++i) { data[length+i] = 0; } return length + paddingLen; } int DLL_IMPORT unpadd(unsigned char *data, size_t length) { size_t dataLen, end; size_t i; if(!data || !length) return -1; dataLen = length; end = length - 1; for(i = 1; i < length; ++i) { if(data[end - i]!=0 && data[end - i]!=1) { return dataLen-1; } --dataLen; } return -1; } /** @brief GOST 14 test data */ unsigned char kSeltTestGost14MasterKeyData[32] = { 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,0x77, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef }; /** @brief GOST 14 test data */ unsigned char kSeltTestGost14PlainText[64] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x00, 0xff, 0xee, 0xdd, 0xcc, 0xbb, 0xaa, 0x99, 0x88, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xee, 0xff, 0x0a, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xee, 0xff, 0x0a, 0x00, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xee, 0xff, 0x0a, 0x00, 0x11 }; /** @brief GOST 14 ECB test data */ unsigned char kSeltTestGost14EcbEncText[64] = { 0x7f, 0x67, 0x9d, 0x90, 0xbe, 0xbc, 0x24, 0x30, 0x5a, 0x46, 0x8d, 0x42, 0xb9, 0xd4, 0xed, 0xcd, 0xb4, 0x29, 0x91, 0x2c, 0x6e, 0x00, 0x32, 0xf9, 0x28, 0x54, 0x52, 0xd7, 0x67, 0x18, 0xd0, 0x8b, 0xf0, 0xca, 0x33, 0x54, 0x9d, 0x24, 0x7c, 0xee, 0xf3, 0xf5, 0xa5, 0x31, 0x3b, 0xd4, 0xb1, 0x57, 0xd0, 0xb0, 0x9c, 0xcd, 0xe8, 0x30, 0xb9, 0xeb, 0x3a, 0x02, 0xc4, 0xc5, 0xaa, 0x8a, 0xda, 0x98 }; /** @brief GOST 14 CRT test data */ unsigned char kSeltTestGost14CrtSV[16] = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xce, 0xf0, 0xa1, 0xb2, 0xc3, 0xd4, 0xe5, 0xf0, 0x01, 0x12 }; /** @brief GOST 14 CRT test data */ unsigned char kSeltTestGost14CrtEncText[64] = { 0xf1, 0x95, 0xd8, 0xbe, 0xc1, 0x0e, 0xd1, 0xdb, 0xd5, 0x7b, 0x5f, 0xa2, 0x40, 0xbd, 0xa1, 0xb8, 0x85, 0xee, 0xe7, 0x33, 0xf6, 0xa1, 0x3e, 0x5d, 0xf3, 0x3c, 0xe4, 0xb3, 0x3c, 0x45, 0xde, 0xe4, 0xa5, 0xea, 0xe8, 0x8b, 0xe6, 0x35, 0x6e, 0xd3, 0xd5, 0xe8, 0x77, 0xf1, 0x35, 0x64, 0xa3, 0xa5, 0xcb, 0x91, 0xfa, 0xb1, 0xf2, 0x0c, 0xba, 0xb6, 0xd1, 0xc6, 0xd1, 0x58, 0x20, 0xbd, 0xba, 0x73 }; /** @brief GOST 14 OFB test data */ unsigned char kSeltTestGost14OfbSV[32] = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xce, 0xf0, 0xa1, 0xb2, 0xc3, 0xd4, 0xe5, 0xf0, 0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0x90, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19 }; /** @brief GOST 14 OFB test data */ unsigned char kSeltTestGost14OfbEncText[64] = { 0x81, 0x80, 0x0a, 0x59, 0xb1, 0x84, 0x2b, 0x24, 0xff, 0x1f, 0x79, 0x5e, 0x89, 0x7a, 0xbd, 0x95, 0xed, 0x5b, 0x47, 0xa7, 0x04, 0x8c, 0xfa, 0xb4, 0x8f, 0xb5, 0x21, 0x36, 0x9d, 0x93, 0x26, 0xbf, 0x66, 0xa2, 0x57, 0xac, 0x3c, 0xa0, 0xb8, 0xb1, 0xc8, 0x0f, 0xe7, 0xfc, 0x10, 0x28, 0x8a, 0x13, 0x20, 0x3e, 0xbb, 0xc0, 0x66, 0x13, 0x86, 0x60, 0xa0, 0x29, 0x22, 0x43, 0xf6, 0x90, 0x31, 0x50 }; /** @brief GOST 14 CBC */ unsigned char kSeltTestGost14CbcSV[32] = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xce, 0xf0, 0xa1, 0xb2, 0xc3, 0xd4, 0xe5, 0xf0, 0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0x90, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19 }; /** @brief GOST 14 CBC test data*/ unsigned char kSeltTestGost14CbcEncText[64] = { 0x68, 0x99, 0x72, 0xd4, 0xa0, 0x85, 0xfa, 0x4d, 0x90, 0xe5, 0x2e, 0x3d, 0x6d, 0x7d, 0xcc, 0x27, 0x28, 0x26, 0xe6, 0x61, 0xb4, 0x78, 0xec, 0xa6, 0xaf, 0x1e, 0x8e, 0x44, 0x8d, 0x5e, 0xa5, 0xac, 0xfe, 0x7b, 0xab, 0xf1, 0xe9, 0x19, 0x99, 0xe8, 0x56, 0x40, 0xe8, 0xb0, 0xf4, 0x9d, 0x90, 0xd0, 0x16, 0x76, 0x88, 0x06, 0x5a, 0x89, 0x5c, 0x63, 0x1a, 0x2d, 0x9a, 0x15, 0x60, 0xb6, 0x39, 0x70 }; /** @brief GOST 14 CFB */ unsigned char kSeltTestGost14CfbSV[32] = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xce, 0xf0, 0xa1, 0xb2, 0xc3, 0xd4, 0xe5, 0xf0, 0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0x90, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19 }; /** @brief GOST 14 CFB test data*/ unsigned char kSeltTestGost14CfbEncText[64] = { 0x81, 0x80, 0x0a, 0x59, 0xb1, 0x84, 0x2b, 0x24, 0xff, 0x1f, 0x79, 0x5e, 0x89, 0x7a, 0xbd, 0x95, 0xed, 0x5b, 0x47, 0xa7, 0x04, 0x8c, 0xfa, 0xb4, 0x8f, 0xb5, 0x21, 0x36, 0x9d, 0x93, 0x26, 0xbf, 0x79, 0xf2, 0xa8, 0xeb, 0x5c, 0xc6, 0x8d, 0x38, 0x84, 0x2d, 0x26, 0x4e, 0x97, 0xa2, 0x38, 0xb5, 0x4f, 0xfe, 0xbe, 0xcd, 0x4e, 0x92, 0x2d, 0xe6, 0xc7, 0x5b, 0xd9, 0xdd, 0x44, 0xfb, 0xf4, 0xd1 }; /** @brief 14 Imita */ unsigned char kSeltTestGost14ImitaValue[8] = { 0x33, 0x6f, 0x4d, 0x29, 0x60, 0x59, 0xfb, 0xe3 }; /* -------------------------------------------------------------------------------------------- */ int SelfTestGost14Ecb() { unsigned char ctx[kEcb14ContextLen]; unsigned char output[textLen14]; if (init_ecb_14_impl(kSeltTestGost14MasterKeyData, ctx)) return -1; if (encrypt_ecb(ctx, kSeltTestGost14PlainText, output, textLen14)) return -1; if (memcmp(output, kSeltTestGost14EcbEncText, textLen14)) return -1; return 0; }; int SelfTestGost14Crt() { unsigned char outText[textLen14]; unsigned char ctx[kCrt14ContextLen]; if (init_crt_14_impl(kSeltTestGost14MasterKeyData, kSeltTestGost14CrtSV, kBlockLen14, ctx)) return -1; if (crypt_crt(ctx, kSeltTestGost14PlainText, outText, textLen14)) return -1; free_crt(ctx); return memcmp(outText, kSeltTestGost14CrtEncText, textLen14); } int SelfTestGost14Ofb() { const size_t svLen = sizeof(kSeltTestGost14OfbSV) / sizeof(kSeltTestGost14OfbSV[0]); unsigned char outText[textLen14]; unsigned char ctx[kOfb14ContextLen]; if (init_ofb_14_impl(kSeltTestGost14MasterKeyData, ctx, kBlockLen14, kSeltTestGost14OfbSV, svLen)) return -1; if (crypt_ofb(ctx, kSeltTestGost14PlainText, outText, textLen14)) return -1; free_ofb(ctx); return memcmp(outText, kSeltTestGost14OfbEncText, textLen14); } int SelfTestGost14Cbc() { const size_t svLen = sizeof(kSeltTestGost14CbcSV) / sizeof(kSeltTestGost14CbcSV[0]); unsigned char outText[textLen14]; unsigned char outTextDec[textLen14]; unsigned char ctx[kCbc14ContextLen]; if (init_cbc_14_impl(kSeltTestGost14MasterKeyData, ctx, kSeltTestGost14CbcSV, svLen)) return -1; if (encrypt_cbc(ctx, kSeltTestGost14PlainText, outText, textLen14)) return -1; free_cbc(ctx); if (init_cbc_14_impl(kSeltTestGost14MasterKeyData, ctx, kSeltTestGost14CbcSV, svLen)) return -1; if (decrypt_cbc(ctx, outText, outTextDec, textLen14)) return -1; free_cbc(ctx); if (memcmp(outTextDec, kSeltTestGost14PlainText, textLen14)) return -1; return memcmp(outText, kSeltTestGost14CbcEncText, textLen14); } int SelfTestGost14Cfb() { const size_t svLen = sizeof(kSeltTestGost14CfbSV) / sizeof(kSeltTestGost14CfbSV[0]); unsigned char outText[textLen14]; unsigned char outTextDec[textLen14]; unsigned char ctx[kCfb14ContextLen]; if (init_cfb_14_impl(kSeltTestGost14MasterKeyData, ctx, kBlockLen14, kSeltTestGost14CfbSV, svLen)) return -1; if (encrypt_cfb(ctx, kSeltTestGost14PlainText, outText, textLen14)) return -1; if (memcmp(outText, kSeltTestGost14CfbEncText, textLen14)) return -1; free_cfb(ctx); if (init_cfb_14_impl(kSeltTestGost14MasterKeyData, ctx, kBlockLen14, kSeltTestGost14CfbSV, svLen)) return -1; if (decrypt_cfb(ctx, outText, outTextDec, textLen14)) return -1; if (memcmp(outTextDec, kSeltTestGost14PlainText, textLen14)) return -1; free_cfb(ctx); return 0; } int SelfTestGost14Imit() { unsigned char outText[textLen14]; unsigned char ctx[kImit14ContextLen]; if (init_imit_14_impl(kSeltTestGost14MasterKeyData, kBlockLen14, ctx)) return -1; if (imit(ctx, kSeltTestGost14PlainText, textLen14)) return -1; done_imit(ctx, outText); free_imit(ctx); return memcmp(outText, kSeltTestGost14ImitaValue, sizeof(kSeltTestGost14ImitaValue) / sizeof(kSeltTestGost14ImitaValue[0])); }